Electronic programme guide for a mobile communications device

A method of managing one or more resources which are limited when a device having said resources is in use, said resources being utilised when an electronic programme guide is generated on said device, the method comprising:

• processing a sub-channel providing electronic programme guide data, the data comprising a plurality of files, each file comprising a sequential listing of electronic programme information for a plurality of programmes of an individual service-channel which are scheduled for broadcast within a predetermined period of time, the processing step being arranged to extract data from each said file indicating for each of said plurality of programmes at least one informational element comprising a characteristic of said programme;
• generating a data record for each individual programme, the data record having a structure which includes at least one said informational element as a searchable index enabling subsequent retrieval of said information;
• and
• storing each said data record received in a data store, wherein said data store is configured to be searchable using said one or more indices, wherein
• an operating system of said device is configured to interrupt any one of the above processes in the event of an alert being generated by a resource required to implement any one of the above steps reaching a pre-determined value.